Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/04/2023 08:02 to 03/04/2023 18:41 LEL (%) CO (ppm) H2S (ppm) VOC (ppm) PM2 5 (mg/m3)1 PM10 (mg/m3)1 HCN (ppm)* Location Date/Time Screening Levels 5% 9 ppm 0.1 ppm 0.5 ppm 0.035 mg/m3 0.035 mg/m3 1 ppm PCR-N-03 3/4/2023 8:22 0 0 0 0 0.002 0.002 0 3/4/2023 12:51 0 0 0 0 0.007 0.007 0 PCR-N-04 3/4/2023 9:38 0 0 0 0 0.005 0.005 0 3/4/2023 13:37 0 0 0 0 0.007 0.007 0 PCR-N-05 3/4/2023 9:44 0 0 0 0 0.004 0.004 0 3/4/2023 13:44 0 0 0 0 0.005 0.005 0 PCR-N-06 3/4/2023 9:13 0 0 0 0 0.004 0.004 0 3/4/2023 13:16 0 0 0 0 0.007 0.007 0 PCR-N-07 3/4/2023 8:41 0 0 0 0 0.003 0.004 0 3/4/2023 13:02 0 0 0 0 0.012 0.012 0 PCR-N-08 3/4/2023 8:50 0 0 0 0 0.003 0.004 0 3/4/2023 13:07 0 0 0 0 0.007 0.007 0 PCR-N-09 3/4/2023 9:20 0 0 0 0 0.004 0.004 0 3/4/2023 13:23 0 0 0 0 0.006 0.006 0 PCR-N-10 3/4/2023 9:30 0 0 0 0 0.003 0.004 0 3/4/2023 13:30 0 0 0 0 0.007 0.007 0 PCR-N-11 3/4/2023 10:05 0 0 0 0 0.004 0.004 0 3/4/2023 13:59 0 0 0 0 0.006 0.006 0 PCR-N-12 3/4/2023 9:55 0 0 0 0 0.005 0.005 0 3/4/2023 13:49 0 0 0 0 0.005 0.005 0 PCR-N-13 3/4/2023 8:59 0 0 0 0 0.004 0.004 0 3/4/2023 14:09 0 0 0 0 0.012 0.012 0 PCR-S-01 3/4/2023 11:32 0 0 0 0 0.006 0.006 0 3/4/2023 15:03 0 0 0 0 0.008 0.008 0 PCR-S-04 3/4/2023 12:10 0 0 0 0 0.006 0.006 0 3/4/2023 15:23 0 0 0 0 0.007 0.007 0 PCR-S-05 3/4/2023 12:05 0 0 0 0 0.006 0.006 0 3/4/2023 15:17 0 0 0 0 0.009 0.009 0 PCR-S-06 3/4/2023 11:56 0 0 0 0 0.006 0.006 0 3/4/2023 15:09 0 0 0 0 0.006 0.006 0 PCR-S-07 3/4/2023 10:53 0 0 0 0 0.004 0.004 0 3/4/2023 14:56 0 0 0 0 0.006 0.006 0 ------- Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/04/2023 08:02 to 03/04/2023 18:41 LEL (%) CO (ppm) H2S (ppm) VOC (ppm) PM2 5 (mg/m3)1 PM10 (mg/m3)1 HCN (ppm)* Location Date/Time Screening Levels 5% 9 ppm 0.1 ppm 0.5 ppm 0.035 mg/m3 0.035 mg/m3 1 ppm PCR-S-08 3/4/2023 10:39 0 0 0 0 0.004 0.005 0 3/4/2023 14:49 0 0 0 0 0.012 0.012 0 PCR-S-09 3/4/2023 12:14 0 0 0 0 0.008 0.009 0 3/4/2023 15:27 0 0 0 0 0.008 0.008 0 PCR-S-10 3/4/2023 8:02 0 0 0 0 0.002 0.002 0 3/4/2023 12:30 0 0 0 0 0.005 0.006 0 PCR-S-14 3/4/2023 10:22 0 0 0 0 0.004 0.005 0 3/4/2023 14:28 0 0 0 0 0.006 0.006 0 PCR-S-15 3/4/2023 10:27 0 0 0 0 0.005 0.005 0 3/4/2023 14:33 0 0 0 0 0.007 0.007 0 PCR-S-16 3/4/2023 10:34 0 0 0 0 0.005 0.005 0 3/4/2023 14:41 0 0 0 0 0.01 0.01 0 See notes on last page. Notes: Highlighted indicate detections above screening levels Grey cells indicate no measurement was collected for that specific parameter 1 - Site-Specific Public Health Screening Levels for particulate matter are based on 24-hour time-weighted averages (TWAs). Fixed discrete monitoring readings are discrete readings, and so do not represent conditions over a full 24-hour period. * - the screening level is the instrument's limit of detection. % - percent CO - carbon monoxide H2S - hydrogen sulfide HCN - hydrogen cyanide LEL - lower explosive limit mg/m3 - milligrams per cubic meter 02 - oxygen PM2 5 - particles that are 2.5 micrometers and smaller PM10 - particles that are 10 micrometers and smaller ppm - parts per million TWA - time-weighted average VOC - volatile organic compounds ------- x Gould . MS§md VcCtufe Ave 'artin S' East Palestine Cemetery Jimtown Legend O Roaming Air Monitoring Locations A Derailment Location One Mile Radius East Palestine Derailment ER Site 75 E Main St East Palestine, Columbiana County, OH 44413 Figure 1 Roaming Air Monitoring Locations TETRA TECH Prepared For: EPA Prepared By: TetraTech Inc. Reference Map Location Date Saved: 3/4/2023 ------- |